Architecture firm HKS, Inc., also responsible for the Dallas Cowboys' AT&T Stadium and the Indianapolis Colts' Lucas Oil Stadium, decided to go for a lightweight translucent roof and glazed entrances with giant pivoting doors, aiming to get as much natural light from the outside as possible. The roof is made up of 60% Ethylene tetrafluoroethylene (ETFE), a fluorine-based clear plastic, and is the largest in North America, spanning 240,000 square feet (22,000 m2) supplied and installed by the firm Vector Foiltec. ETFE's low R-factor and the roof's slanted design, inspired by Nordic vernacular architecture, allows the stadium to endure heavy snow loads. Snow accumulates in areas that are more safely and easily accessible, and also moves down the slanted roof into a heated gutter, the water from which drains to the nearby Mississippi River.
The translucent roof and large wall panels also give fans a view of downtown Minneapolis. The glass operable wall panels allow the stadium to experience some of the outdoor elements while providing protection from the snow, rain, and the cold winter weather. The stadium is aligned northwest and the elevation at street level is approximately 840 feet (255 m) above sea level.
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